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  • Giro Tyrant MIPS Helmet
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GiroTyrant MIPS Helmet

Item # GIRZ31M

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Item # GIRZ31M

Tyrant MIPS Helmet

From backyard jump jams, to sessioning your favorite piece of singletrack, Giro's new Tyrant is designed to meet the needs of today's progressive trail riders. Though the style is reminiscent of old-school BMX helmets, it comes equipped with modern safety features like Spherical MIPS and progressive foam layering that handles both high- and low-speed impacts.

The Tyrant may bear a resemblance to the Switchblade full-face helmet without the chinbar, but it's actually significantly lighter and has better ventilation. You'll still enjoy added coverage for the sides and back of your head, but it's a bit more practical for trail riding, pump track sessions, or dialing in your jumping skills. The adjustable visor mates perfectly with goggles, while the Roc Loc fit system makes it easy to get a secure and comfortable fit.

As far as protective features go, the Tyrant gets Giro's latest and greatest. It starts with the new MIPS Spherical system, which uses two distinct foam layers that work like a ball and socket to redirect impact energy in a crash. The outer layer is EPS, which is well-suited to high-speed crashes. The other is a lower-density EPP foam that addresses the low-speed, roll-around-in-the-dirt type of spills that can happen when you're learning a new feature or practicing your manuals. The whole package is wrapped in a tough outer shell with a polycarbonate lower wrap that adds durability while keeping the weight down.

  • Open-face helmet with added coverage for rowdy trails
  • Two-piece shell brings durability without excess weight
  • MIPS Spherical redirects impact energy during a crash
  • EPS foam outer layer protects against high-speed impacts
  • Softer EPP inner layer takes care of low-speed impacts
  • 14 vents with internal channels to keep your head cool
  • Stack vents draw air away from goggles to prevent fogging
  • Adjustable Roc Loc fit system enhances comfort and stability
Tech SpecsSize
Tech Specs
Shell Material
hardshell with in-mold polycarbonate lower wrap
Impact Foam
[outer layer] EPS, [inner layer] EPP
Multiple Impact
MIPS Spherical
14 vents with internal channeling, Stack Ventilation at brow line
Fit Adjustment
Roc Loc® Air
adjustable, tool-free bolt-on
Recommended Use
trail, dirt jumps, freeride, bike park
Manufacturer Warranty
1 year


Adult Cycling Helmets
Super Fit™
Head Circumference

18.5 - 20in

(47 - 51cm)

20 - 21.75in

(51 - 55cm)

21.75 - 23.25in

(55 - 59cm)

23.25 - 24.75in

(59 - 63cm)

24 - 25.55in

(61 - 65cm)

Head Circumference

21.25 - 24in

(54 - 61cm)

19.75 - 22.5in

(50 - 57cm)

22.75 - 25.5in

(58 - 65cm)

How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

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